CVE-2021-31540

7.1 highEPSS 0.4%

High (7.1) in wowza streaming engine. EPSS 0.4% chance of exploitation in the next 30 days.

Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ directory. A regular local user is able to read and write to all the configuration files, e.g., modify the application server configuration.

Severity

CVSS 3.1

7.1 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
CWE: CWE-732
Published: 2021-04-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

wowza:streaming_engine

References

https://www.gruppotim.it/redteam
https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notes
https://www.wowza.com/products/streaming-engine
https://www.gruppotim.it/redteam
https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notes

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